You're seeing just the function default, go back to Liquex.Filter module for more information.
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default(value, def_value, _)

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Allows you to specify a fallback in case a value doesn’t exist. default will show its value if the left side is nil, false, or empty.


iex> Liquex.Filter.default("1.99", "2.99", %{})

iex> Liquex.Filter.default("", "2.99", %{})